I tried to do the strategy I see speedrunners doing but I failed

Its very hard, you may need to spend an excess amount of time to pull it off

I found a fun trick where you can go up the bottom jump pad and dive onto the head of the backpacker turtle and get a simply ridiculous amount of speed, completely by accident. Perhaps you could try that?

Its known and used

I actually do the backpacker strategy

Just watch Alfa 777s run

I created a guide teaching how to speedrun Dr. Christopher, and you can go to the guide here.

I accidentally did the speedruner thing but I still didn’t get diamond.