by Gormash
What I reacted most to with the Gom Gom Bazooka was that is was a Lance (possibly hitting multiple foes) AND that it dealt massive damage (2 wounds).I've not seen the anime these figures are dased upon, so I don't know how it works thematically, but from the word "bazooka" I imagine a missile speeding toward the enemy and then explode.
If you want to make it powerful enough to do some massive damage you could try this:
(3R AP)Gom Gom Bazooka: +1R ATT, Ranged 3, Burst 1, Massive Damage, Dangerous
That way you could use it to take out a lot of mobs at short range, but if you're not careful you could hurt yourself or your allies too.
About potions... Page 20, paragraph 6 under the POTION TYPE header:
Heroes can also use their own potion to benefit another Hero. To do this, the Hero uses their own potion normally, but declare another Hero anywhere in the dungeon (no matter how far away!) will recieve the benefits instead.