I don't know if anyone else has used or known about this, but I think I discovered something in the PRG0 ROM of DK Jr.
At the end of the second stage, if you go as far to the left (right below the vine) as possible, turn around, and do the backward jump trick (as used in the level 3 glitch), you completely skip climbing up the vine and beat the stage.
I don't know if this saves a lot of time, but I thought it was neat to share.
You can see this being performed in my recently submitted run. Currently pending.
This is a neat trick. Unfortunately when I do it it's a bit slower than the regular strat cuz I have to wait for the bird.
I think if you get there a little slower(or maybe faster) than I do it does save time. I did a crude comparison loading a state on the top right platform and timing till the end of the stage and this saved almost a second when I didn't have to wait at all for the bird.
Nice find!
