Why do Staryu and a few other Pokémon not say their names when all the others do?

Electabuzz

I can’t find any solid evidence as to why Electabuzz has its bizarre cry. This site speculates that Electabuzz was some kind of thunder oni, though Raijin seems a more likely inspiration:

Pictures similar to this famous one, which depicts Raijin with two horn-like protrusions, might have inspired Electabuzz. Its horns also look like Raijin’s drumsticks. If Electabuzz was inspired by Raijin, perhaps its cry is supposed to sound like thunder?

Maybe.

Starmie and Staryu

These are easier. As noted here:

Staryu has a very recognizable personality in the anime to those familiar with Japanese pop culture. More than any other Pokémon in the anime, Staryu and Starmie share the mannerisms of their cultural basis, the 1960s television hero Ultraman (the original Japanese name Hitodeman is the ultimate clue as hitode is Japanese for starfish). Staryu’s movement and “kiai” sound mimic Ultraman, but the most noticeable similarity between them is the jewel on their chests. When Staryu and Ultraman are low on energy, the jewel begins to blink and chime a warning alarm.

Here’s the Staryu sound:

And here is Ultraman’s sound:

Krabby/Kingler

These Pokémon make an odd sort of chirping noise:

Best guess, this is supposed to sound like a sound a real crab would make.

Victreebel

Victreebel basically just screams:

I cannot even attempt to understand why this is.