Oopsies. It was late here when I typed that out; I'm surprised that was my only typo, really. Let's try that again.
Okay, I'm going to try to get a signature move for my Cyndaquil, Khao.
[Khao] Cyndaquil (M)
Ability: Blaze
Signature Move: Volatile Spirit
Cyndaquil are known to be cute and meek little Pokemon. Not only are they small and light, they lack any sort of daunting, lethal weapon that would deter predators or other threats. Their only defense is to curl into a black-and-yellowish ball and flare up their back flames at the first sign of danger.
Khao is a special little cookie - he's far from the stereotypical Cyndaquil. From an early age he's loved adventuring into forests, mountain ranges, and the like, driving his mother mad with worry when he disappeared for days at a time. He always came back, of course, perhaps with only a few bruises, but more often than not covered with wounds of varying sizes. The vicious Pokemon in the wilderness simply were not deterred by a small fire on their prey; after all, there are other areas you can bite or scratch without burning yourself.
Now, Khao was worried that one day, he would run into a particularly fierce Pokemon that would claw him to pieces, back-fire or no. Of course, he figured, the only way to completely deter them was to cover his entire body in flame. No-one would want to bite through a coat of white-hot fire for such a small morsel.
In the beginning, he had no success whatsoever. The flames stubbornly stayed on his back, no matter what he did. Eventually, he found that, by concentrating more energy in his back, he could make the blaze larger and hotter. Finally, after months upon months of practicing, he perfected the technique of swathing his entire body in flame. It took a fair amount of energy, and he wasn't immune to his own flames, but he was satisfied with his progress for now.
Effects: After Khao has been sent out, he may use an action to activate his attribute. It doesn't matter which action it is - it can be the 1st action, it can be activated during the fifth round, whatever. From then on, Khao has the ability Flame Body in addition to all other abilities. It cannot be switched off from that point on, though if Khao ever falls below 30% energy he simply becomes too exhausted to keep up the fire, and it will fade away. Even if energy is restored so that he climbs above 30% energy once more, he won't be able to activate it again. On the flipside, the flames will intensify if he's in great danger - that is, less than 15% healt - so any Pokemon that makes contact with him, friend or foe, will suffer 1% fire-type damage.
Obviously, the flames require energy to maintain, and it costs 2% energy per round to maintain this state. Finally, even Khao is not immune to his own fire, so he'll also take 1% damage every round his attribute is active.