This is a Longplay of all Cups in Mario Kart DS in 150cc Mirror for the Nintendo DS played by me.
I play through the all the cups perfectly, always achieving all possible points and 1st Place with ★★★ Rank
I switch the Character and Kart every other Cup, allowing me to showcase all characters.
I do so to show all of them and have as much variety as possible in this Walkthrough.

Mario Kart DS (2005)
[Nintendo DS] / Nintendo Wii U
Playing through all Cups in 150cc Mirror
Perfect Scores / ★★★ Rank
Upper Screen - 4:3 Aspect Ratio
4K (UHD) [2880p x 2160p] 60fps
Lower Screen - 4:3 Aspect Ratio
720p (HD) [960p x 720p] 60fps

Timestamps:

1. 00:00 - 150cc Mirror | Mushroom Cup
Peach | Light Tripper
2. 09:47 - 150cc Mirror | Flower Cup
Luigi | Streamliner
3. 21:29 - 150cc Mirror | Star Cup
Mario | Shooting Star
4. 33:14 - 150cc Mirror | Special Cup
Waluigi | Gold Mantis
5. 45:58 - 150cc Mirror | Shell Cup
R.O.B. | Standard RB
6. 54:19 - 150cc Mirror | Banana Cup
Waluigi | Standard WL
7. 1:03:57 - 150cc Mirror | Leaf Cup
R.O.B. | ROB-BLS
8. 1:13:52 - 150cc Mirror | Lightning Cup
R.O.B. | ROB-LGS