The Sea Lion and Sky Lion fully form by combining with a cruise ship and a blimp, respectively, so they should both be much larger than other Zords that combine with things like a jet or a dump truck.
In the episode "end game" the Megaforce episode Robo knight gave the red ranger The Robo blaster to use against the Messenger and the Red ranger never returned it to Robo knight but in the Super Megaforce episode "vrak strikes back" dark Robo knight had the Robo blaster with him when it should have still been with the red ranger.