Baylene:
>Type: Water
HP: 100
Attack: 60
Defense: 80
Sp. Atk: 100
Sp. Def: 80
Speed: 100
>BST: 520
Abilities:
Rubberized - This Pokemon is immune to electric moves, but takes double damage from Fire moves.
(HA) Storm Drain - This Pokemon is immune to Water-type moves and raises its Special Attack by 1 stage when hit by a Water-type move.

Mega Baylene:
>Type: Water
HP: 100 -> 100
Attack: 60 -> 80 (+20)
Defense: 80 -> 100 (+20)
Sp. Atk: 100 -> 120 (+20)
Sp. Def: 80 -> 100 (+20)
Speed: 100 -> 120 (+20)
>BST: 520 -> 620 (+100)
Ability: Regenerator - This Pokemon restores 1/3 of its maximum HP when it switches out.

It learns Water Spout and most of the typical moves you'd expect a bulky water to learn, but doesn't have recovery moves outside of Rest and Aqua Ring.