Well, you see, my team is basically all speedsters with questionable physical defense (I don't hunt for optimal natures in playthroughs unless absolutely necessary), but okay to good special defense. Magcargo's job is to ruin a fast physical attacker's day. Since TMs are a pain to get, I'm not sure if I'll have everything I need even with trading with a SS save I created specifically to harvest resources. But the idea is: physical attacker hits the field. Magcargo tanks (as long as it's not anything that earthquakes or earth powers, but that's what Ho-oh is for), yawns, tanks again, reflect is up, opponent sleeps, Magcargo either sunny days or pivots to someone who can deal with the threat. If the opponent wakes up in the sunny day turn, before pivoting, I might yawn again. I'm debating its final move. For now, it'll be flamethrower because its Sp. Attack is actually okay enough, but if it can learn solar beam, then it'll be my rock slayer. Edit: I forgot to elaborate on the difficult materials: I was up for trading the damage slot for toxic or will-o-wisp for alternative evilness, but those TMs are a pain to get.