How did I go second?

I was battling in the Battle Maison and I have no idea of how I went second?My team was a Greninja, Talonflame and Mega-Kangaskhan. I sent out Talonflame first and they sent out Bastiodon.I switched out to Greninja and Bastiodon used Stone Edge, which missed.Then, I used Surf with Greninja and Bastiodonwent firstusing Thunder and KO’d me.,

How did this happen? My Greninja has 31 IVs in Speed and 252 EVs in Speed. I know the Bastiodon didn’t have a Choice Scarf, and even if it did, it shouldn’t have been faster than me. There was no Trick Room or Sticky Web in play. Is there something I may be missing?

Thanks!

Pleaselog inorregisterto add a comment.

All causes that I thinked and may outspeed you Greninja are here, however with your details, none of them works:

Bastiodon don’t have abilities that boosts the speed.Thunder don’t have priority.The use of 2 different moves by Bastiodon shows that it’s not Choice Scarf.It can’t use Trick Room, Sticky Web and Tailwind.As you say, your Greninja wasn’t holding a Iron Ball/Lagging Tail.You say that Bastiodon had Leftovers and that shows the not using of Quick Claw.

I found that some Battle Maison’s pokémonsHAVE MORE THAN 5 MOVES AND 2 ITEMS!I askedhere, and it’s pretty possible that Bastiodon should have Quick Claw and Leftovers!There isn’t another explanation that I know.

Also checkthis.Hope this helps.

Hope it helped.

Based on the information given, the only conclusion I can get is:that the Bastiodon must have been holding aQuick Claw.

Even IF it was using a Choice Scarf(which we know it wasn’t) it would nowhere be as fast as Greninja.

Greninja’s Max Speed: 377Bastiodon’s Max Speed: 174