They are great together as they often help each other out
On the flip side, dual-ink cards can have much more powerful combinations and synergies
Competitors in the Kamex Mega Battle tournament could participate in side events while waiting for their next match
Not only is it good in the early game (to capitalize while they're weakest, and to extend the early game), it's also cheap and fine in the late game (when you can store it up to overload their defenses)
I'm still curious if toxic has enough actually good cards to make work in Commander ( which I am withholding opinions on until I see them more in action ), but I think this is a really good supporting piece if that deck comes together well
Overall, Fire-type Pokmon have a wide variety of utility in a match, and some of them are quite close to being meta-relevant in upcoming formats