Egg Hunt 2019: Robot 64 Secret Area 

It is no longer possible to visit this area.

ok

It is if you can get out of bounds.

You can reach to the test area and then go to the egg ship and then BOOM IT REALLY WORKED!!!!!!

@@EFB57 actually it is possible, using the flamethrower or the jetpack, you can reach to the edge of the hub to enter this black hole, entering the black hole will lead to the testing area or what looks like it in the game. The giant egg is also shown in this area, going in it enters you here

There's a couple of ways to do it, but I used a harder one. What I did was use a Corner Climbing technique used to scale almost any wall. An easier way is to go towards the opposite side of the map from there and drop down; there's a jetpack under the ledge. Be careful, though; you have to press the button for jetpack quickly after getting it, for the ground underneath it is entirely lava. With it, you can fly to the island.

Btw it’s plasma