To understand why The Pokemon Company is creating this app, we need to look at the larger gaming industry
If you attack with higher-power creatures, the training ability can naturally boost Ryus power, and since you attacked, Ryu is tapped, which means you can untap to use the Hadoken ability
To solve There are five colors among permanents you control
This is almost Path to Exile power level, in blue
Dharc the Dark Charmer, Gloomy is the most relevant "charmer" in the format, as Dark Attribute Monsters are the most present in the meta, but each one of them have their importance and the best for you is the one that best fits your deck
Secret Lair x Jaws: Terror of Amity Island Jaws, Relentless Predator - Original card Descent into Avernus (Panic on Amity Island) - $10 Nonfoil / $10 Foil Reckless Endeavor - $7.60 Nonfoil / First Foil Sneak Attack - $5.89 Nonfoil / $5.74 Foil Abrade (You're Gonna Need a Bigger Boat) - $0.25 Nonfoil / $0.25 Foil Blood token $0.20 Nonfoil / $0.40 Foil Total = $23.94 Nonfoil / $16.39 + Reckless Endeavor I'm also ranking this one higher than the technically more valuable horror Furbies because it has a mechanically unique Jaws card