Not a problem, thoughMeowscarada exs Bouquet Magic ability lets you discard a Grass Energy to deal 30 damage to a benched Pokemon, creating perfect synergy
Attacking is the easiest way to tap Sanwell, but you could also tap it to crew a vehicle and get the opportunity to play something on another players turn, as the ability ignores timing restrictions
If the triggered ability doesn't resolve (because, for example, it has been countered, or all of its targets have become illegal), the cycling ability will still resolve, and you'll draw a card
If you do, put 2 damage counters on that Pokmon
And since in most sets you only get a tapped creature by having it survive combat as an attacker, these rewards can actually be quite substantial
The Combat Tutorial Magic card art also directly homages one of the earliest battles in Final Fantasy X