The holobots are kinda like mannequins or crash test dummies. Humanlike but featureless. The holobots are partial sentient but not completely. Zero pointer are fully sentient. I believe one Zero pointer per training zone?
One pointers are 5 ft. basic slender constructs similar to mannequins. Fast and like to dodge. They aren't tanky like the others.
Two pointers are a lot bigger at 8 ft. They are bulkier and have thick clunky armor. They are slow but are tough and hit hard.
Three pointers are shorter than two pointers at 6 ft. They are still bulky, but their armor is more refined and improved allowing more durability, speed, and these guys hit really hard too.
Zero point mechs kinda resemble gundams, if that makes any sense? Large robots.
Here's a gundam to use as reference. The zero pointer is 40 ft. Tall. And has powerful lasers in its eyes. It can also control nearby holobots. Meaning it may use a one pointer as a meat shield to take incoming hits. The zero pointer hits on a whole nother level. If the one pointer hits like a brick, and the 2 and 3 pointers hit like a truck, then the zero pointer hits like a train. Its fast, but a little slower than the three pointer, but greatly makes up for it in power and durability. Also "death lasers". In contrary to name... they won't kill you... In one shot... three hits should probably do the job though... to quote Present Mic, "Try not to die".
Any questions? I feel like I'm leaving something out.