Those are some awesome SMB2 enemies and sprites you made perfectly. I love them.
I have some ideas for even more of the SMB2 enemies you are working on in a future C3 thread. Here are the following.
Albatoss + ridable Bob-omb
Blue Beezo (that flies horizontaly straight, but when they flies offscreen, they move a block down or up Zig-Zagging to Mario like in Mushroom Kingdom Fusion
Yellow Panser from SMWCP (that moves and follows Mario and spits fire in a straight vertical line like the green ones)
Big ShyGuy (SMA)
Big Ninji (SMA)
I hope they will come out as Series 4, but in the future, we will find out and see. Thank you for showing us your amazing work you did. We are proud of you.