I was building for a Little Cup League and I have a Bulbasaur. I wanted to give it chlorophyll and reflect which Showdown says it cant have. However it can, all pokemon obtained from gen 1 have their hidden ability and Bulbasaur can be taught reflect in Generation 1. So either you can get the Bulbasaur and never level it up in Red/Blue and teach it Reflect then transfer it or you can get it in Yellow and teach it reflect and transfer it. Use Heart Scales in Gen 7 to teach it future moves and have a Level 5 Bulbasaur with Reflect and Chlorophyll.