can u find these evil majins anywhere? whats the best way to find them and/or area to look for them?

since i assume ur new... im going to help u.. u have to be a certain lvl .. the majin appear when u kill a mob. i think u have to be what lvl 30 or 40 . I forget i havent been low lvl in sooooo long lol

female majins appear after lvl41, and fat majins after lvl51

what do i do when i kill all 30?

go to kill event boss with other ppl when boss meter is 100% (bosses appear on red/yellow mushroom maps), and after boss killed Hope robot npc spawn with quest turn in, then you can exchange 250 coins for boss title with stats like cooldown, dexterity etc. that come with it (titles are changed monthly)