I'm not sure, actually. But you seem pretty distraught by just the possibility that you don't have a soul. I'd say that's a good sign.
You didn't go on a rampage when you learned your true nature, unlike every other robot. That's another...
What is the measure of a pony, anyway? Just yesterday, it was all so simple: robots don't have souls, so they aren't completely sentient. Hence, when they learn what they are, they are driven mad with existential terror.
*tearfully, Sweetie Belle arms her self-destruct* *Rarity, Pinkie, and Rainbow Dash haul ass out of the Conversion Spa as Sweetie Belle is consumed by the Smooze avatar that was once Fluttershy* *as the Eclipse ends, the Conversion Spa and everything in it is incinerated by a brilliant column of pink and lilac light*
not best bot BEST PONY. sweetie bot beep boops and doesnt afraid of anything.
and this image clearly misses the whole point of the sweetie bot character, never once does sweetie belle's sentience ever come into question. the thought that she might be a robot doesnt even cross her mind. THATS WHY ES SO FUNNEH AND LAUGHY TIMEZ.