Effect updates and description changes can be seen here.
Card Skin (Undyne)

Sexy Fish

Undyne is a great monster that can quickly change the tide of war. She has fairly hefty pricetag, however with her ability to deal 8 damage split randomly upon the enemy monsters on the field, she can quickly kill off or weaken most of the enemy simply by entering play.

Card Skin (Undyne) 2



Card Skin (Undyne) 3

Spear of Justice

Best played when the enemy has a total of 8 HP among their monsters, so she can clear out the entire board. She can also be used in combination with Asgore, although that comes at an enourmous price of 28G. Undyne works very well against monsters with Dodge (this being Sans and Sad Dragon only), as because of the 8 × 1 damage ability, they will most likely die because of it. This card is useful in most decks, however particularly so with Determination and Justice.

Card Skin (Undyne) 4

Summer Undyne

Creatues like Mad Dummy cannot be killed by Undyne's ability as it distributes the attack 1 damage at a time upon the monsters.

Card Skin (Undyne) 5

Pirate Undyne

Card Skins:

  • Sexy Fish (by Moonlightring)
    • This skin is no longer for Sale.
  • Justice (by Moonlightring)
  • Spear of Justice (by Darky)
  • Summer Undyne (by Moonlightring)
  • Pirate Undyne (by Moonlightring)
    • This skin is no longer for Sale.


Undertale OST - NGAHHH! Extended

Undertale OST - NGAHHH! Extended

0:00 - 0:05

  • For April Fools' 2017, the picture was replaced with the 'sexy fish' meme picture. This was re-used in 2018, but closer up.
    • She gained a Card Skin based on this.
  • Also, a fake 'Super colored card' was made for this monster.