Either use one of them DV checky things that's around the net,
Just test it out. Go around attacking Wild Pokemon with it. i.e. attack a Psychic with it. Is it supereffective? If so, find a fire type and hit it. Is it normal effective or does the Pokemon resist? If it resists, then you got a Bug Hidden Power.
"It looks like this is my lucky day. I'll take 'The Rapists' for 200."
"That's 'Therapists,' not 'The Rapists.'"
-(Saturday Night Live Celebrity Jeopardy Skit)