Hmm after reading the helpful stiky telling me to always post on these threads... i say.. it's rather good, even if only with a tool attached. Kick away: Old cards alwyas stated whether the damage was before or after the switch, so I'm slightly annoyed they make it less clear here (I assume it is before, effects of attacks come after main damage)
Even so, 50 for 3 energy on an 80 hp monster seems powerful, especially if your opponent is using pokémon-ex. I would look and see if there is a synergistic Pokémon Tool to use with it before deciding to play it though.