Viewing Mod
Eevee is a new adorable character with 5 available eeveelutions!
Created 8 months ago

It's Eevee!

Isaac's Mom is closing in as Isaac finds a trapdoor to the Basement, hidden under his rug. Too terrified to risk surviving the fall or breaking his precious legs, he sends his trusty Pokémon, Eevee, down to kill Mom for him.

(If you decide to make a video on my mod, I kindly ask that you leave a link to the mod in the description. Thanks!)


  • A New Character: Eevee!
  • Evolutions! Evolve into the 5 currently implemented eeveelutions that act as transformations, but give the feel of an entirely new character! Evolve into Flareon, Jolteon, or Vaporeon using their respective stones found in the shop/secret room. Evolve into Espeon/Umbreon by going into an Angel/Devil room when at max happiness!
  • Unlocks! The Eeveelutions are locked behind your typical character unlocks. Currently there's one for It Lives (not Mom's Heart), Boss Rush, Hush, Satan, and Isaac.
  • A Happiness system! When collecting pickups or items, your happiness will increase based on their value. Used for evolving into Espeon and Umbreon.
  • Emoticons! When expanding the map, an emoticon will appear above you! It can display your current happiness or give you instructions about your eeveelution's ability!
  • Vitamin items! One vitamin exists for each stat. They also give you a good boost in happiness.
  • And much more! There's lots of small details and unique features in this mod that make Eevee fun to play. I've poured a lot of love into this mod, and continuing to do so as I develop the other eeveelutions!

Eeveelution Abilities

Flareon, Jolteon, and Vaporeon are getting brand new, more unique abilities in the next big update. Check out the discussion below!

  • Flareon: Burning tears with a chance of leaving fire on the ground.
  • Jolteon: Faster firerate, Jacob's Ladder tears, higher speed, less damage.
  • Vaporeon: An extra red heart and bubble tears which leave small water creep. Has a chance to leave bigger pools.
  • Umbreon: Dark Pulse! Charge up a "to-the-side" chargebar (Ex: See Maw of the Void) and release a pulse of dark energy which knocks back projectiles and enemies. Fear is also applied to those enemies. (Slightly nerfed in next update)
  • Espeon: Light Screen! Like Umbreon's method of charging up, but instead placing down a Light Screen! This magical mirror reflects any projectiles and adds homing onto them (Largely buffed in next update)

Planned Features:

  • Implementing the rest of the Eeveelutions
  • A unique death animation (Part of the next update!)
  • Adding unique costumes to Eevee and the Eeveelutions for any popular items (Brimstone, Monstro's Lung, Ludo, Tech 1 and 2, Godhead, etc)
  • True Co-Op Support (Suspended till Repentance)
  • A mysterious 9th Eeveelution unique to this mod!
  • Items that would have you gain each Eeveelutions' unique effects while playing as characters besides Eevee. Either in the form of fursuits or omething else.

Currently Being Worked On:

    Giving Flareon, Vaporeon, and Jolteon all new abilities, alongside some quality of life/misc changes and additions!

Known Issues:

  • If you pick up Burning Bush while playing as Eevee, you don't shoot out anything, and so you deal 0 damage. (Unknown as to how to fix)
  • There are lots of specific instances in which Eevee won't retain their perfect adorable look. I've yet to figure out what to do for these.
  • Eevee's tear splash is offset when hitting the floor. (Fixed in next update)
  • Umbreon's tear sfx when the tear hits something does not replace the basic tear splash sfx when it hits the floor (Fixed in next update)
  • Espeon's tears don't rotate when appropriate, such as with My Reflection and Rubber Cement. (Fixed in next update)
  • Some tear effects don't scale appropriately with items like Parasite.
  • Issues with action key-reliant actions (Showing happiness and Umbreon/Espeon's chargebars) not showing up at all.

Special Thanks:

  • orisghost for creating all the boss portrait sprites! They're extremely well-made!
  • Kaltriv for creating Electro Ball's animation and all achievement pages!
  • TikaraTheMew for the workshop thumbnail!
  • Many people in the Binding of Isaac discord for being a huge help. They'll always be out to help those in #modding.
  • Lytebringer's tutorials for giving me a general idea of what to do (They can be a bit confusing if you don't know what to replace from what he types, bu they're very good for starters)
  • lambchop for influencing how I go about creating my code.
  • @HHappyTotalX for providing 3D models of Eevee & Vaporeon to help me with sprites
  • @TerriLinkan for providing the side sprites for Eevee's ears and hair fluff (I also used the side ears for Flareon, Jolteon, and Espeon, just modified slightly.)
  • Sbody2 for proper tear rotation and scaling on the non-tear-shaped animated tears.
  • Tesseract for creating the cacheHandler and teaching me how to properly handle the stat calculations.
  • Wofsauge for helping me with Espeon and Umbreon's chargebars and willingly improving my costume and spritesheet applying code. I added the flight variations into the code myself.
  • piber20 for the Shadow Ball sprite code, and of course the existence of their piber20helper to help with achievements!
  • Taz for creating the double tap code for Flare Blitz.
  • Pokémon 3D, a fan-made 2.5 remake of Pokémon Gold and Silver, for saving me any trouble ripping sprites from the Pokémon games.
  • ALL OF YOU for supporting my mod and giving it lots of love. You helped more than any one person could.

This mod is also available on the Steam Workshop



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- Every character sprite has been made from scratch for better looks and consistency!

- Additions

- Eevee, Flareon, Jolteon, and Vaporeon all have brand new fur/needles/neck fins respectively. These changes were made as the original sprites were kind of cheated to make them fit.

- Eevee and Flareon's body animations have their arms sticking out of their fur. Jolteon and Vaporeon don't have this as their "scruffs" are sturdier and above the arms.

- Eevee has a brand new tail sprite which also comes with its own smoother animation when walking up.

- Flareon given a new simpler side-view tail

- Changes

- Eyes are symmetrical, making the sprite somehow even cuter.

- Vaporeon and Umbreon's color palettes were changed slightly.

- All sprites given a "centered" shading like player sprites should have instead of heavy shading on one side, looking better overall.

- Only noticable in the files, but how the flight sprites are done in the animation files is entirely different. Take a look if you're curious as to how it's done!

- Changes

- Slightly nerfed all happiness values

- Bug Fixes

- Fixed starting stats with the Oxy and/or Belle mod installed

- Bug Fixes

- Fixed getting Eevee's costume when continuing a run as any character

- Fixed Espeon not playing any hurt sound effect

- Polishing Update

- The Umbreon/Espeon update was mostly good in its main features, but some unproper balancing issues and some bugs surfaced alongside due to somewhat of a rush to get it out. This update cleans up (most) important bugs in the update while also getting some cool additions!

- Additions

- Umbreon now has shiny markings on their legs! This was supposed to be the case initially but I forgot to add it to the body costume.

- Unique tear variants and sfx! Flareon and Jolteon have been given some sfx, and Umbreon and Espeon have been given unique tear sfx AND sprites! Note that Espeon's sprite does not scale due to the way the tear was made, so it'll always stay the same size.

- Any items/pills that would add/change your costume now properly works with Eevee.

- Keys and Bombs of all types now give Happiness!

- Compatibility with the No Costumes Mod! I mean there's no point to having it on while playing as Eevee since literally every costume has been put on the whitelist but I went and did it anyway.

- Changes

- Everything that previously added Happiness has been buffed in value! It should be easier to gain max Happiness now.

- Changed the amount of Happiness that coins give.

- When starting a run as shiny, you get a sparkle effect on Eevee!

- General improvements to code.

- Bug Fixes

- Vitamins work properly, and on all characters! Enjoy the stats.

- Fixed Happiness Emoticon not appearing when expanding the map while playing on a controller.

- Fixed coins not adding the proper amount of Happiness when there's coins of different types in the same room. It would previously increase the value based on the lowest valued coin in the room.

- Fixed your costume being reset upon exiting the game and continuing a run as Eevee.

- Fixed Flareon's ears being spread apart too far when firing upwards.

- Bug Fixes:

- Fixed the Fire, Water, and Thunder Stones showing up in runs with characters other than Eevee.

- Fixed the faint sound effect not playing

- Changes:

- Made the sfx for taking damage and dying replace the original sounds much more frequently. This means less instances of hearing the original sound.

- [/list]

- 2 New evolutions: Espeon and Umbreon. Increase your happiness through various means (which can be tracked by holding the map button. TAB by default) and head to either the Angel or Devil room to touch a beam of light and evolve into the appropiate evolution.

- Vitamins that increase your stats! There's one for every stat. Find them in the treasure room or the shop.

- Flight costumes! No longer shall you walk in the air. Don a modified version of the Sky Dash vehicle from Let's Go Eevee upon picking up any flight items.

- Shinies! You have a 1/10 chance to start a run as shiny. This also affects the evolutions too, and even the flight costumes!

- DEBUG ITEMS! Type "g gain" or "g remove" in the debug console in order to change what eeveelution you are and if you are shiny or not.

- All main head sprites have been modified. More specifically the nose has been made smaller and ears are more detailed and closer together.

- The way evolution works have been changed and now extremely streamlined. It's now truly impossible for you to evolve into any eeveelution if you are already one (with the exception of the debug items, which force it)

- Evolution stones SHOULD now show up 3x as much in all item pools! You're welcome.

can you make it a .zip file? i can't open .rar files... and if you can't do that, can someone tell me how to open a .rar file for a mod? (i'm 12 btw)
very cool
I like how all chracters are balanced and fun to play
January 16, 2020 - 3 months ago

Maintenance complete! We have moved to a new web server! Speed and stability should be improved. If you notice any issues, please mention them in our Discord server.