I have beat episode 18. If you mean the final fight before the end of the episode, yes that was more difficult than I expected when most of my mons aren't able to outspeed.
Ah actually I was talking about the gauntlet with shelly/cain, luna, then radomus/serra. Hardy was a bit challenging due to his surprising speed but compared to the gauntlet wasn't as bad. Solaris wasn't too hard by this point aside from staraptor and his megarchomp which was just really bulky.