the reason I wanted Swellow over tailow is for standed use in OU tailwind is very underrated since it the few turns you get you can take out just as many pokemon as there is turns who would otherwise outspeed you I used Combee as my origenal fragile tailwind user alongside my Mega heracross who toke out every pokemon that came in the only times this failed was when either combee diden't get its tailwind in or mega pinsir or talonflame was still on the field which have priority flying moves sometimes came across fast scarfers but most of those coulden't KO my mega Heracross which is what made me post that Combee set but later on thought I could use many other tailwind users as examples for this but my post was removed so I desided to leave things and stop posting for awhile