Glitch report: I set my first pokemon as rotom on team preview as my first, when the battle came up the pokemon out was chansey, who was the first pokemon before moving rotom there. Also, the team preview screen didn't go away when the match started. I didn't have any other matches running at the same time.
When I used chansey's move, it turned out to be my rotom w's move except the screen showed chansey's moves and graphic. When I switched out to what on my switch screen was rotom w, it adopted rotom w's appearence and moves, but when I used them, they were chansey's moves.
The glitch seemed to affect appearence only. Though on my screen I was seeing rotom w, the game treated it like chansey for all purposes, and vice verse when chansey was out it looked like but was treated like rotom w. The move selection was also effected, showing one pokemon's move set but if you clicked on it, it would turn out to be the other's. THe move selections retained their original placement, so if you remembered the location of your other pokemon's moves, you could play as normal.
My opponent saw the pokemon he should have. The glitch did not affect him. This was on pokemon online server. Wifi or BW OU ladder rated battle. singles.