This won't be necessary. Only 2 or 3 characters use suicide moves and also there are 70 other characters to do classic mode on that don't include suicide moves. There is going to be a set strategy either way might as well be the faster one.

Just to have everything in one spot. After the fight in Bomb 2 you can up B over the wall with R.O.B and skip the autoscroller which saves like 45ish seconds. You buffer jump and then up B. During the up B you want to stop up Bing then start it immediately as R.O.B carries his momentum and makes going over the wall easier and you just wall until you touch the platform with spikes and clip back through the wall. NTSC

Unsurprisingly PAL is better. You just fall down and die. Then you spawn almost all the way down.

Actually you can snipe that target to the left with the cannon shot and then drop down down to get the remaining 2 targets on the left. All characters can do this so you can get an average of like 17-20 seconds for all characters. I'll post a video soon.

(Edit) Forgot I had a video on hand. This is no way the optimal run I accidentally turned around. If I did it better I could of saved like 3ish seconds.