Smash Ultimate Tier Lists - Playability

Wait, if Lucina is in the Playable characters section, why isn't Chrom and Robin? Also shouldn't the other fe characters also count as playable?
Also, wouldn't Wii fit trainer rather count as "seen in background" then "npc"? I wouldn't know cause I haven't played Wii Fit, but from what I've seen of it I would deem that more fitting.

OBJECTION! Peach was the protagonist of Super Princess Peach for the DS and was playable in several other Mario titles, notably Super Mario Bros 2 (US).