List of Mario Kart DS pre-release and unused content

These are beta elements from Mario Kart DS.

Beta Elements
The Retro Grand Prix was going to include a few more tracks, such as Mario Circuit (old_mario_gc) from Mario Kart: Double Dash!!(likely removed in favor of the new Mario Circuit), and Block City (mini_block_course) battle area, also from 'Mario Kart: Double Dash!!''.

Unreleased Courses
You can only access these courses with an Action Replay DS.

This was a debugging state not intended to be playable in the release version.
 * A small, circular debugging course (smaller than Baby Park).

No textures and the music from SNES Mario Circuit.
 * dokan_course

Possibly a new Koopa Troopa Beach course, as nokonoko is the Japanese term for Koopa Troopa. It does not seem to resemble it's predecessor in any way, and could have been an entirely new Koopa Troopa course. This course is left untextured.
 * nokonoko_course

Uses the map from Rainbow Road but contains other objects such as the bridge from Delfino Square and the gears from Tick-Tock Clock. There is also a mysterious "test_brock" which is basically a 3D checkered object.
 * test1_course

Changes from the Pre-Release Versions
Demo version guides released for stores by Nintendo depicted the Chain Chomp (which could not actually be retrieved in the demo version itself) as an item; it is presumed that this Chomp item would function simmilarly to that of the Chain Chomps in Mario Kart: Double Dash!!. Although the listing of the Chain Chomp in these beta guides may have been a simple mistake, though this is unlikely. The Chain Chomp can be seen in the item roulette in beta versions of the game.
 * It is likely that the Chain Chomps were removed in favor of Bullet Bills.

Courses
Different textures and the music from Yoshi Falls. The slot machine near the end of the level was part of the course for players to drive over. It is assumed the changes in this course are largely due to programming errors.
 * Waluigi Pinball

Textures from the Tart Top battle arena on the floor and bumpers, as well as other changes. Some demo copies show many differences, such as more bumpers and a less direct launch towards the beginning.
 * Waluigi Pinball Beta (pinball_course)

Exactly the same but missing fireballs and crowd cheering. The real Wario Stadium is called stadium_course.
 * Wario Stadium (wario_course)

Uses a grassland theme, possibly to be more thematic with it's associated charter. One lone Thwomp near the finish line, as well as many other small differences mostly regarding walls and jumps. The final release DK Pass is called snow_course.
 * Unused Donkey Kong Grassland Course (donkey_course)

Course filenames

 * Figure-8 Circuit=cross_course, and the beta is cross_courseD
 * Yoshi Falls=bank_course
 * Cheep Cheep Beach=beach_course, and the beta is beach_courseD
 * Luigi's Mansion=mansion_course
 * Desert Hills=desert_course
 * Delfino Square=town_course, and the beta is town_courseD
 * Waluigi Pinball=pinball_course, and the beta in the Final version is donkey_course but it is supposed to be pinball_course
 * Shroom Ridge=ridge_course
 * DK Pass=snow_course
 * Tick-Tock Clock=clock_course
 * Mario Circuit=mario_course
 * Airship Fortress=airship_course
 * Wario Stadium=stadium_course
 * Peach Gardens=garden_course
 * Bowser Castle=koopa_course
 * Rainbow Road=rainbow_course
 * SNES Mario Circuit 1=old_mario_sfc
 * N64 Moo Moo Farm=old_momo_64
 * GBA Peach Circuit=old_peach_agb
 * GCN Luigi Circuit=old_luigi_gc
 * SNES Donut Plains 1=old_donut_sfc
 * N64 Frappe Snowland=old_frappe_64
 * GBA Bowser Castle 2=old_koopa_agb
 * GCN Baby Park=old_baby_gc
 * SNES Koopa Beach 2=old_noko_sfc
 * N64 Choco Mountain=old_choco_64
 * GBA Luigi Circuit=old_luigi_agb
 * GCN Mushroom Bridge=old_kinoko_gc
 * SNES Choco Island 2=old_choco_sfc
 * N64 Banshee Boardwalk=old_hyudoro_64
 * GBA Sky Garden=old_sky_agb
 * GCN Yoshi Circuit=old_yoshi_gc
 * Nintendo DS=mini_stage1
 * Twilight House=mini_stage2
 * Palm Shore=mini_stage3
 * Tart Top=mini_stage4
 * N64 Block Fort=mini_block_64
 * GCN Pipe Plaza=mini_dokan_gc
 * old_mario_gc=The unused GCN Mario Circuit.
 * luigi_course=The unused different-route-and-textured version of Waluigi Pinball.
 * dokan_course=The unused bendy course with two pipes.
 * test1_course=The unused unloadable beta version of Rainbow Road.
 * donkey_course=The unused jungle themed version of DK Pass.
 * wario_course=The unused version of Wario Stadium.
 * nokonoko_course=The unused beach course which many call Koopa Troopa Beach.
 * test_circle=Self-explanatory.
 * mini_block_course=The unused GCN Block City.
 * MR_stage1=Mission Run Stage 1(used).
 * MR_stage2=Mission Run Stage 2(used).
 * MR_stage3=Mission Run Stage 3(used).
 * MR_stage4=Mission Run Stage 4(used).
 * StaffRoll=The Course seen during the Staff Credits.
 * StaffRollTrue=The True version of the course seen during the Staff Credits
 * Award=The Course used in the Victory lap at Figure-8 Circuit.