Of course it would have to be modded but i just wanna know

New Super Mario Bros. Wii on Scratch on 2:33 just some minutes ago. Forgot to record but i got livesplit on my side to prove it

holy crap i got a time of 2:33.03
Grassy Grasslands: 0:50
Sadistic Sands: 1:32 -44.2
Ballistic Beach: 2:33 -15.7
Oh my god i am lucky

This is a Scratch game with 3 Levels, and some buginess. With fast inputs, i got a time of 2:48. So, here is how i got it.
I will also include strategies to it.
-----------------------------------------------------------------------------------
Level 1: Grassy Grasslands

Strat 1: Piranha Plant Cycle Skip
I use a Mushroom and take damage to skip the 2nd cycle in Grassy Grasslands.

Grassy Grasslands wasn't that hard. Got a super mushroom, did a cycle skip or two, and completed the level in 1:16. The level was fast.
--------------------------------------------------------------------------------Level 2: Sadistic Sands

Strat 2: Koopa Line Skip
By doing repetitive left and right inputs, i skipped a line of koopa's coming towards me.

Sands took at least 1 cycle skip, and went well. A koopa line skip was done halfway into the level. The final time in the timer was 2:16.
--------------------------------------------------------------------------------
Level 3: Ballistic Beach

Beach took at least 1 long cycle skip, and then ended the time with 2:48. Short level because i went fast.

So, since there is American Dad intro speedruns, how about Tiny Toon Adventures? its a good idea, i think so.