Tip: You can use Lunar Magic's Overworld Layer 3 Editing system to edit or create your own layer 3 images (castle bricks, fish, rocks) and apply unique effects per level via the Layer 3 Bypass in the main editor.
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Details for New Super Mario Bros. - Trampoline Time
SMW Music - New Super Mario Bros. - Trampoline Time
@TheEvilKingBowser I only learned today that it's also in SMS (not very familiar with the game); though, the SMS version, besides obvious mixing differences (better reverb), has a slightly different arrangement. I actually prefer this version!