After playing through VB Wario Land for the first time, I've noticed that the other games seem to take heavy inspiration from VB. Most notably is the key, which returned in WL4 in the form of Keyzer. There are other things too, like the fish that pop out of the holes in stage 3, many of the sprites, similar enemies and whatnot. Rudy the Clown in WL3 clearly took inspiration from the Demon Head final boss in VB, and the spearhead enemy is very similar to the Mask-Guys. Even WLII used the swimming mechanics introduced in VB!
Although WLII did take the series in a different direction, I think VB doesn't get enough credit for innovating and helping to turn WL into what it is today.
Although WLII did take the series in a different direction, I think VB doesn't get enough credit for innovating and helping to turn WL into what it is today.