I have suggestions for two characters at the moment:
1. As far as Luigi's moveset is concerned, I believe it is different enough from Mario's. It would be very cool to see Luigi's Mansion represented in his moves, but with Mario's F.L.U.D.D., it may be difficult to come up with something unique enough without seeming forced. Then is his Final Smash. I don't know if Negative Zone is in one of his games, but to me it seems too random. My ideas for solving this might seem lame, but here they are. This could be where his Mansion attack is, but probably not. Maybe a lightning attack, like in Superstar Saga. Also, he could transform into Mr. L from Super Paper Mario and use the BroBot in something. Anyway, I think that this should be considered.
2. A diehard Pikmin fan, I was upset at one small thing lacking about Olimar that would have admittedly had a small impact on the game, but would have made quite a difference to his regular players: bulmin. These were a very rare and difficult to obtain species of Pikmin in Pikmin 2. They were Pikmin-sized bulborbs with stems sticking out of their backs. They were resistant to fire, electricity, water, and poison, and I believe that they were as strong as red pikmin. In Smash Bros., these would have the combined abilities of all the pikmin, excluding the mobility modifications of the whites, yellows, and purples, and excluding the enhanced purple knockback. There would be a very small chance of Olimar plucking them.
1. As far as Luigi's moveset is concerned, I believe it is different enough from Mario's. It would be very cool to see Luigi's Mansion represented in his moves, but with Mario's F.L.U.D.D., it may be difficult to come up with something unique enough without seeming forced. Then is his Final Smash. I don't know if Negative Zone is in one of his games, but to me it seems too random. My ideas for solving this might seem lame, but here they are. This could be where his Mansion attack is, but probably not. Maybe a lightning attack, like in Superstar Saga. Also, he could transform into Mr. L from Super Paper Mario and use the BroBot in something. Anyway, I think that this should be considered.
2. A diehard Pikmin fan, I was upset at one small thing lacking about Olimar that would have admittedly had a small impact on the game, but would have made quite a difference to his regular players: bulmin. These were a very rare and difficult to obtain species of Pikmin in Pikmin 2. They were Pikmin-sized bulborbs with stems sticking out of their backs. They were resistant to fire, electricity, water, and poison, and I believe that they were as strong as red pikmin. In Smash Bros., these would have the combined abilities of all the pikmin, excluding the mobility modifications of the whites, yellows, and purples, and excluding the enhanced purple knockback. There would be a very small chance of Olimar plucking them.