Buck Bumble

all weapons + infinitive munition
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level-modifier [NOTE #1]
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NOTE #1:
Not only the level will be modified, but the introduction-music as well.

XX = 00 - black srceen
XX = 01 - normal level 1 (training?)
XX = 02 - normal level 2
XX = 03 - normal level 3
XX = 04 - normal level 4
XX = 05 - normal level 5
XX = 06 - normal level 6
XX = 07 - normal level 7
XX = 08 - normal level 8
XX = 09 - normal level 9
XX = 0a - normal level 10
XX = 0b - normal level 11
XX = 0c - normal level 12
XX = 0d - normal level 13
XX = 0e - normal level 14
XX = 0f - normal level 15
XX = 10 - normal level 16
XX = 11 - normal level 17
XX = 12 - normal level 18
XX = 13 - normal level 19
XX = 14 - normal level 20
XX = 15 - normal level 21
XX = 16 - normal level 22 (?)
XX = 17 - introsequenz
XX = 18 - beta-demo!
XX = 19 - ending
XX = 1a - footballarena (from Buzz Ball)
XX = 1b - battle-arena 1
XX = 1c - battle-arena 2
XX = 1d - battle-arena 3
XX = 1e - battle-arena 4
XX = 1f - battle-arena 5
XX = ff - You can hear the title-rap in stereo during the intro

Setting XX = 18 leads you to some kind of demo-mode.
Simply pause the game for some time (this will irritate the game´s demo-mode), resume it and as soon as Buzz slams against a wall, you can take control of him.