At what level does tentacool evolve?

Answer 1

Tentacool evolves into Tentacruel starting at level 30.

Tentacool is #72 in the National Pokedex, and was introduced in the Generation I Pokemon titles (Red, Blue, and Yellow) where it could be found on Routes 17-21 and in Pallet Town (and other areas specific to each game). In Generation VI (X and Y), it is available on Routes 8 and 12, in Ambrette Town, Azure Bay, and in Cyllage and Shalour Cities.

____

Tentacool evolves at Level 30. If you have caught a Tentacool that is somewhat over that level, it will evolve on the next 'level-up.'
Lv. 30
Tentacool evolves into Tentacruel at level 30.

Answer 2

Give hime a tenta ghoul so he dies and you get to see pussies