why werent Bulk and Skull together?

Saban and Jason Narvy could only work out getting him to play a cameo for Skull in the finale of Super Samurai, while Paul Schrier was cool with being a regular and having a teen sidekick in form of Skull's son. So it's kinda like what happened with Lost Galaxy, where Skull only had a cameo and Bulk was still around, though he only popped up for a few episodes there. If you're not a fan of Bulk and Skull, I wouldn't say Samurai (and by extension, Super Samurai) is worth checking out, it's a pretty lame and cheap piece of the Power Rangers franchise IMO. I do watch "Clash of the Red Rangers", but only because that ties a tiny bit into one of my favorite other seasons that wrapped up the Disney era, RPM.

Superman & The [Red-Blue] Blur = The Man of Steel