Your best route to achieving multiple sounds at once is really a combination of many effects. Hell, the Metasonix is as you said it was... a MULTI-fx.
As a former owner of several Metasonix and Trogotronic boxes, I can tell you how wonderfully inspirational they are with their multitude of sounds,
but also how incredibly frustrating it can be to get REPEATABLE sounds...
If you had that very pedal sitting right in front of you, I’d be willing to bet you’d still never get those sounds you were asking about.
So, you have to look at what you want and how you want to interface with it.
Do you want to play it like a pedal, having your signal be warped and mangled by the “noise fuzz” but still controllable enough to be recognized as a guitar?
Or are you ok sitting with it for an entire afternoon, gently teasing the knobs and exploring the sonic hellscape that vomits forth, sampler ready to capture “lightning in a bottle”?
If it’s the first one, tons of pedals that have already been mentioned will fit your need.
I’ll toss a few more of my favorites that, admittedly, toe the line:
LAL 88 Super OSCILLO Fuzz
Snarling Dogs Mold Spore
Devi Ever / Dwarfcraft Soda Meiser w/ noise switch
Adventure Audio Dream Reaper
Mountainking Decomposer
Z. Vex Fuzz Factory (the ol’ standby...)
But if you’re feeling more adventurous, then anything can be your noisemaker. A lot of the Metasonix “sound” is achieved by feeding back the signal at various stages in the circuit and then piling up gain stages until they literally fold back on themselves creating that filter-y squelch that makes the hair on the back of your neck stand on end.
You can traverse a similar route with feedback loops (as simple as plugging a two output pedal back into itself) or matrix mixers. You can also delve into circuit bending an old pedal you don’t use anymore.
Remember:
The Lion Turtle wrote: In the era before the boutique noisemakers existed, they did not buy their sounds, but they bent the circuits within themselves.