Pokemon Trainers are people that catch, train, care for, and battle with Pokemon, and this Pokemon Trainer is modeled after Lucas from Pokemon Diamond and Pearl, and he also controls Grotle, Infernape, and Piplup. If he and his Pokemon join in Super Smash Bros. 4, the Trainer will sound very similar to Kenny from the Pokemon DP series, being voiced by either Rhonda Krempa or Bella Hudson, with Grotle, Infernape, and Piplup being voiced by Billy Beach, Bill Rogers, and Michele Knotz, respectively. The Pokemon Trainer will not go by the name of Lucas, as it could cause confusion with the Lucas in Mother 3.
Lucas, while having the possibility of Piplup, Grotle, and Infernape, another possible would be Torterra, Monferno, and Piplup using these moves.
Torterra; Leaf Storm, Earthquake, Wood Hammer
Monferno; Mach Punch, Flame Wheel, Flare Blitz
Piplup; Drill peck, Surf, Bubble beam
Final Smash; Triple finish