What are some obvious filler designs? Pokemon where it was clear no creativity or thought was put into them and they're just there to fill a space.

I don't necessarily just mean ugly designs, I more mean boring, lazy. Like that Barnacle Pokemon I think is an ugly design, but you know what? We didn't have a Barnacle Pokemon before so as weird as that is at least it was an attempt at something new. This? This is just a fucking penguin with an ice cube on it's head. It doesn't even match the rest of the designs in the series.