Mélokrik

Diamond +2: It crosses its knifelike arms in front of its chest when it cries. It can compose melodies ad lib.

Pearl +2: It signals its emotions with its melodies. Scientists are studying these melodic patterns.

Platinum +4: There is a village that hosts a contest based on the amazingly variable cries of this Pokémon.

HeartGold / SoulSilver: By allowing its cry to resonate in the hollow of its belly, it produces a captivating sound.

Legends: Arceus: It uses its cutlass-like arms to produce sound, the melody of which varies from individual to individual. It is a worthwhile endeavor to seek out one's favorite tunes.