>>51756694>JoltikHas a unique niche not filled by any animal, feeds off static electricity. Wouldn't compete with anything.
>FlabebéProbably photosynthesizes.
>CutieflyIs an obligate nectarivore and competes with Butterfree for food. There may be other animals that could fulfill the niche of a pollinator, there may not be. I can't say for certain, but for argument's sake we'll say that natural selection has escalated to the point where Butterfree and Cutiefly have wiped them all out.
>ComfeyProbably photosynthesizes.
>CosmoemIs an extremely rare alien space dust creature and wouldn't impact the ecosystem in any significant regard.
>SinisteaSeems like it parasitizes humans exclusively.
There are still plenty of ecological niches that can be filled by small bugs and animals, even if we're to disregard pollinators entirely.