Blade Base: Griffolyon Base
Narrow, rounded tip provides exceptionally poor stability and Defense as well as no movement.
The pseudo-free-spinning tip is mounted to a cylindrical plastic piece which sits inside the Base, but this has little effect on performance, and the way it is molded leaves a molding line down the centre of the tip, which often results in unevenness and thus even poorer balance than the already appalling tip shape itself provides. In addition, the "free spin" gimmick is limited by the large contact area between this centre shaft and the surrounds as well as needing sprues from the runner frame to be clipped very carefully to not scrape.
The cherry on top and most infamous part of the base are the four poles hanging down from it, which not only scrape extremely easily and violently when the Beyblade loses stability (a very common occurrence given the tip), but also make the side of the base (from which they protrude) extremely recoil-heavy should anything reach low enough to hit it.
Strong contender for worst Blade Base of the entire generation, as Jumping Base (Trygle) at least has a vaguely interesting gimmick and isn't actually significantly worse.
Notable Mold Differences:
There is a second mold of Griffolyon Base, used in Bakutenryu Etanzel, which has a shorter tip - though not enough to make a significant weight impact. The reason for this decision is unknown, but as a result of this it scrapes incredibly easily, making it a close run thing between its compatriot Bakutenryu Donitrus's Mold 2 Salamalyon Base which while marginally more practical does often self-induce its scraping.