My trainer's wants to bring out the best in whatever he gets, so what fun is an already super powerful Pokemon. He likes bug Pokemon though, so Beedrill's looking real good for a mega. Pinsir's taken, but never really liked Pinsir. Not feeling Heracross. Getting another Scizor would feel like cheating on his Pokeathlon star XP Am I missing any mega bugs?

Or I could just say screw it an go with slowbro...

As for the legendary, I'm same boat as Loony. At most just be friends and call on em in moments of great need.