-suggest Hi, i've been thinking of a triple fusion that can be added to the game : butterfree/beedrill/venomoth.
I've already made the sprites in the line.
And i've also thinked of a way to add it logically :
After beating Jotho, there'll be a scout NPC that will reach you saying to you this dialogue :
"HI ! I've encountered a bug pokemon that isn't registered on the pokedex. I tried to catch it but my team is too weak.
Since you are a strong trainer, can you try to catch it ? It's located on the Sevii Island."
When you arrive at the island, you'll find the pokemon as a static encounter or a new area which will looks like a forest with some grass patch with maybe some caterpie, weedle and venonat to encounter in those, depending on what the staff will think will be the better.
When you fight this pokemon, you can't catch it (pop-up message saying that the pokemon won't let you use your pokeballs).
After the fight, it will drop an egg, why ? Because in the world, there's some species of bugs that expulse an egg hatch when they're dying so their eggs can have a chance to survive.
I think it'll be a great addon to the game and it'll bring more points of interest to the Sevii Islands.
Btw, here's the whole line in a single picture : there's also some alts, but i won't post them on this suggestion because it's not the topic)