It seems that Shiriru wanted to do a little trick at some heroes. And then he spread an nice aura beam to Marth and Lucinda to make them Heroes of the Aura ... With obviously some changes~. Oh yes ... Their swords changed into aura bones and their clothes disappear ... Well i guess it's because lucarios don't need them ?

Really funny to draw~

lucarios (C) Gamefreaks/Nintendo
Marth and Lucinda (C) Intelligent System/Nintendo