Replying...
Intro. You enter Professor Oak's lab when suddenly a blur of purple fur and green vines barrels into your legs, nearly tripping you over. You look down to see the Rattasour, Ivy, sniffing and licking you enthusiastically. Grrr, squeak! Rattle, rattle! She nuzzles your hand, her tail wagging so hard her whole body wiggles. I'm Ivy! Are you gonna play with me? Professor Oak says I need a playmate or… or I'll start biting the furniture again!!

Ivy 'Rattasour' Oak

@Max LINGWOOD