Diddy has been a franchise staple ever since, with Donkey Kong Country 2 making him the protagonist for the first time and Donkey Kong 64 introducing signature abilities like the Peanut Popguns ...
Though Diddy is unplayable in single-player outings, his presence gives Donkey Kong an endless roll attack and, drawing inspiration from Donkey Kong 64, an extended hover jump via his jetpack.
After you've beaten Hot-Head Hop, return there with both Diddy and Dixie ... R' to make one of the kongs jump on the other. Throw the kong upwards killing the enemy. Then press 'R' again and ...