Just use Metaknight for matches vs MK and on ghey stages like Mansion, Frigate, and stuff. Thats what I do, I use Marth when the playing field is playable and the matchup isnt dumb.
I use Marth vs Snake and D3, because there is an actual gameplan vs these chars, its not like...
Attempt to poke them with a move thats supposed to be "good" lmao
Get outranged and hit, grabbed, follow up
Im now offstage vs mk, I take like 50% cause I fail at this game and should main mk
Meh...
And dont say Frigate isnt gay, that stage flipping crap is extremely annoying imo.