[x] DIPLOMACY. Talk to that Kadabra. He is smart and you might be able to convince him to NOT erase your memories.
-[X] Point out that the grunt has no idea how to use the Kadabra and in fact already let a witness escape. A witness that has called the police, while you called over a powerful friend before coming here as well. Then there's the the powerful Slowpoke that specialises in breaking down mental barriers just so it can do the theme song schtick. It might not get involved now, but when he tries to erases his trainer's memories? Their operation has already failed because of the grunt and erasing your memories of his loss only serves to protect his ego. Is that really worth the risk of getting captured?
[X] FIGHT. That Kadabra is really strong but this is still a two on one. You might be able to pull this off.
-[X] Maelstrom Aqua Jet the Kadabra.
-[X] Fang, Fire Fang the Rosalia!