Here’s the 1997 Turbo Bumble Bee!
As you can see, coming from the very good performance of the Pro-Yo II we now have
- replaceable response pad stickers
- metal bearing
And thus begins the dawn of the modern yo-yo! 
I don’t know if you can see it in the pic but there was a bit of rust on the outer edge of the bearing. I cleaned it up as best I could with a lightly oiled buffing cloth, then thick lubed the bearing. It plays great, actually. 
Now just add some metal to the mix (Cold Fusion, a year later), begin sloooowly widening the yo-yos a tad, and we’re set for the last yo-yo boom around 1999, as you can see here:
I don’t think I’m going to bother getting a metal Cold Fusion, since they’re (as far as I know) basically just metal Bumble Bees, and a bit pricey as they are in demand by collectors.