KOing ability
Pikachu's KOing ability is mediocre at best; he can get some really early kills with Thunder, but he doesn't have that much KO moves, and nair isn't that strong (opponent has to be near 150% for it to kill reliably), while his smashes each have issues (all have lowish knockback scaling, f-smash has slow start-up and requires the opponent to be in your face to kill, u-smash has similar sweet spotting issues while being weaker, and d-smash is really easy to SDI out of before the final blow). Pikachu is overly reliant on Thunder near the top for kills.
Also, for a pro you missed, Pikachu has some good momentum cancelling, both vertically and horizontally (more so vertically). As such, his endurance is better than usual for his weight class. Omega Tyrant 
07:38, 22 July 2013 (EDT)