Krypton (the gas on Dirk’s planet) sinks and is located only at the base of the planet so when they are on top of the buildings they are safe and don’t need gas masks

That’s in reference to the legendary blade Caledfwlch that Dave’s gonna use. Caledfwlch is a Welsh name and is a sword capable of harming Lord English.

Canon

Aranea describes him as a “passionate body builder” but whether or not he’s as strong as Equius is uncertain.

Here.

He’s talking about how he sent a killer robot to beat up Jake in an attempt to help him get stronger but Jake wasn’t okay with it at all. He’s also talking about how he basically bullied Jake into a relationship with him and was very manipulative. I also talked about the similarities of Dirk and Bro in this ask if you want to look at that. 

Here. 

No, Spades Slick took on the name Slick because he knew it would irritate the Black Queen since she hates the Genesis Frog. 

It was her cruxite artifact that she needed to use in order to enter the Medium. 

Here.