Of the dangers of copypasting assets from one game to another
Pokémon Rumble 4 comes packaged with a blunder of epic proportions, which has everything to do with the tendency the series has to just copypaste everything from one game to another. The first three games all featured multiplayer, and as such some moves, such as Helping Hand, the Pledges, Fusion Bolt and Fusion Flare, are centered exclusively around multiplayer. Well, this one does NOT have multiplayer, but they haven't removed either those moves' multiplayer functionality, nor any reference to them. In a nutshell, Helping Hand is basically Splash in this game. Oops?