You inherit the abilities from major characters in cutscenes, so an item get jingle would be inappropriate. Think of it like how you gain new abilities in Illusion of Gaia on the SNES more than obtaining a special item in a Metroid game.
Thanks! I'm still at the beginning of the game's development. Wrote the scripts that make the game's mechanics work, but only recently started making visual assets for it. Before recently I was using test graphics. Composed music for most of the planned stages and events.