Little easter egg I noticed

[Creeps20]

In the observatory, the trial takes place somewhere slightly different. However, you can enter the other room. By interacting with the machine used last time, it comes up with a slightly amusing intetaction. It involves saying that it apparently uses too much electricity. I like this refference a lot.

 

[string555]

Another one is that right after you beat Guzma at the Team Skull hideout, if you go and sit in his chair it starts a small cutscene with a Team Skull grunt that was kind of funny. ;D