Well...I didn't test it, but you should win the matchup.
When NonEx Bannette atacks, you retreat for sth else and KO/Damage. You also have farmer. It's a nasty matchup, but I think Bannette<Mercury. You could always play 2-2 Umbreon ex like MadHatter said. It is huge counter to Banny.
When NonEx Bannette atacks, you retreat for sth else and KO/Damage. You also have farmer. It's a nasty matchup, but I think Bannette<Mercury. You could always play 2-2 Umbreon ex like MadHatter said. It is huge counter to Banny.