There would be an immediate dopamine rush to seeing Spike, Faye, Jet, and all the others on cards but I could just slap Spikes face on a Magic card with a bit of Photoshop and a proxy printer
Yes, on top of being reasonable extenders, these monsters each also boast an interactive effect, kind of like Therion (Coincidentally, another engine that might fit here)
Cons: As is fitting of a ninja, Greninja suffers when its not lurking in the shadows
Gotcha - Whenever an opponent says "Deal" or "Damage," you may say "Gotcha" If you do, return Deal Damage from your graveyard to your hand
There are so many examples of passive card draw engines in Lorcana, with varying degrees of success, and frankly this is a good thing: Amber Amethyst Emerald Ruby Sapphire Steel Cards like Cinderella - Knight in Training, Simba - Future King, and Tinker Bell - Tiny Tactician are card sifting and improvement engines and not card draw engines for the purposes of this discussion
Menace makes it easier to attack with this commander, but youll still probably want other ways to keep it safe so you can trigger its ability