After the battle for the Gold Print in Pokémon Diamond, Pearl, and Platinum he makes a reference to the first to Gen.IV games stating that he and the player's in game father went out to "the lake" where they were attacked by Pokémon and had to fend them off. But claims not to remember how.
Palmer has the same voice actor as Link From Legend of Zelda: Ocarina of Time.
Palmer sends out Dragonite in Twinleaf Town. Some of the inhabitants remember Dragonite.
Palmer's Milotic was seen in the prologue of the movie; Arceus & The Jewel of Life. In the prologue, it is seen battling Cynthia's Garchomp. It managed to hold its own in battle against Cynthia's Garchomp and used attacks such as Protect, Ice Beam and Aqua Ring