Do they Eat Pokemon?

OMG

well maybe because its a cartoon

Maybe not a single one was seen because they were all being eaten?

actually, there are some normal fish shown
right in the next episode

Not true. In the old episodes they showed a mongoose, chicken, and even regular fish. Old concept art also featured a regular dog and a kitten.

Its the same
As us eating our pets
Farmers keep cows as pets you can get dog and cat meat
This is why im vegan
Go vegan guys or vegetarian even if it is for only a day, week, month, year or the rest of your life