Whismur in depth
Gonyonyo, or the sound of mumbling
The Japanese name is ゴニョニョ, taken from ごにょごにょ, the onomatopoeia Japanese uses for someone mumbling and being hard to understand. English gets to the same place by another route: whisper and murmur stuck together, a whisper and a murmur. Both languages describe the low volume and neither mentions the shriek, just like the official category.
The body is a pink sphere with cross-shaped eyes and two yellow flaps for ears, more rabbit-like than anything else. The part that explains everything is internal: it breathes through its ear ducts, which is why it can scream continuously without stopping to take a breath. The same ears that act as its lungs also act as plugs when it wants to be quiet.
Twenty levels and that’s it
Its level-up movepool goes all the way to 45, but evolution cuts in at 20. Uproar and Hyper Voice, both with 90 power, are written for a Pokémon that by then is already something else. What it does have time to learn is the level 15 pair: Rest and Sleep Talk come together, giving it a complete loop of healing while asleep and continuing to attack from sleep.
The TM list is generous and doesn’t help much. Flamethrower, Ice Beam, Blizzard, Solar Beam, Fire Blast and Shadow Ball are all available, and all of them run through roughly 51 Special Attack. The extreme case is Blizzard, 110 power that in its hands becomes an ordinary hit. Howl at level 10 is the closest thing to a plan: raise Attack before Stomp arrives.
In Ruby and Sapphire, it can be found on Route 116, in the tunnel at the end of that route and on Victory Road, which fits its cave habitat. The first of those places is just after the second Gym, exactly when a team has room for a cheap Normal type.
The only one that can’t hear itself
Soundproof is a perfectly placed joke. The whole species is built around noise—the category, the Pokédex entries, the evolution that ends up as a speaker with legs—and the ability it gets is immunity to other people’s noise. A Chatot trying Uproar on it does nothing, and neither does a Jigglypuff using Sing.
Rattled wasn’t there from the start. It arrived later as a hidden ability, and it fits the personality described in the entries—the creature that gets scared by its own voice—better than it fits its 28 Speed, which doesn’t become useful even after the boost.
Compared with the rest of its line, the difference isn’t in the shape of the spread but in the scale and the attitude. Loudred and Exploud start by shouting; this one only does it when cornered, and once it’s over, it falls asleep from sheer exhaustion. It’s the only stage of the three that an opponent might never get to hear.