Dr. Acula got 5 right.

(SPOILER)I didn't really think the answer would be common sense. At the same time, I thought that quite a few people would know it from playing Roy's Fire Emblem game after learning about him in SSBM.

I was thinking of using Lilina for 5 instead but I thought I should avoid using any Nintendo characters that showed up in the Super Smash Bros. series in any way whatsoever since it may become too easy that way.

Keep sending in more pictures for people to guess. I should be submitting a few of my own eventually (unless I'm too busy).