Dragonite, Porygon 2, and Bellossom say hi. Especially Bellossom, since it is smaller than Oddish and Gloom. Also, several other Pokemon are lighter than their previous forms.
Besides, Denchura doesn't have to be an Ariados evo. It could just as easily be a split-evo from Spinarak.
Also, Bug/Poison =/= Electric/Bug. To think they're related merely because they're both spiders/they look vaguely the same is silly.
Azurill, a Normal type, becomes a Water type Marill upon evolution. Onyx becomes the Steel type Steelix, as does Scyther to Scizor. Swablu goes from a Normal type to a Dragon type. Skorupi from a Bug type to a Dark type. Really, you can't just dismiss such a type change just because it isn't a common occurence.
Also, did you even bother to read some of the previous posts? Just take a look at my last quote to see why Denchura being related to Ariados is very possible(at the very least they look like each other, look at how many Pokemon that their evos don't share any similarities!).
TheDarkLucario said:
This^ Wurmple, Weedle and Caterpie are all Caterpillars. Ariodos and Denchura have completely different color schemes.
And your point is? Spinarak and Ariados have a completely different color scheme. So why would it matter if Denchura and Ariados did? Also, Scyther to Scizor, Poliwhirl to Politoed, Magikarp to Gyarados, Feebas to Milotic....
^Pretty much why I believe Denchura is related to Ariados in some way(whether it be via evolution or a split-evolution from Spinarak).