AKA: Bakutenryuu/Bakutenryū Zeo (alternate spellings), ZEO (capitalisation), Geo/Gio/Jio (mistranslations), Zeo (nickname).
Attack Ring and Blade Base names are unconfirmed (they have no official names), names are selected based on the earliest release using them.
Attack Ring: Zeo Attack Ring
Solid range and well exposed primary contact points in Right Spin deliver a lot of power with only moderate recoil, making it a competitive choice for Smash Attack in this direction.
Overall, an excellent choice for Right Spin Smash Attack
Despite the better angle of various contact points in Left Spin, the primary contact points are less effective in this direction, leaving the Attack Ring lacking the power that makes it so effective in Right.
Overall, while it has some Smash Attack, it is not competitive in this spin direction.
Weight Disk: Ten Wide
Weight: 14.0g (Takara/Hasbro) | 14.3g (SonoKong G-Blade)
Moderately light weight
Recoil means it is far less effective for spin stealing and survival than those weight disks
Still has plenty of use for Smash Attack, particularly with Attack Rings which are obstructed by Wide Defense.
Can still be used for spin stealing to decent effect with parts that compensate through LAD (Spiral Change Base/Full Auto Clutch Base etc) or by providing a buffer (Dragon Saucer SAR), but is still outclassed.
Blade Base: Zeo Base
Built in Right SG (Four Layer System style)
Behaviour between SG Flat Base and SG Semi-Flat Base, not quite as controllable as SG Semi-Flat Base but with more aggression, making it a rather nice tip to use.
Large exhaust pipe details extend from the sides, which have some recoil (though they're rarely hit), and cause some scraping issues, though these are very minor due to the angle between the base and the stadium floor.
Overall, it is generally the best of the Hidden Spirit Bases, but still outclassed by the likes of SG Metal Flat Base (Gaia Dragoon V Version) and rubber-tipped attack bases.
With a very effective Attack Ring, a useful Weight Disk and an okay Blade Base, as well as a pretty neat Dragon figure and unique aesthetics (barring Bakutenryu Aveiron, of course), Bakutenryu Zeo is a good buy if found cheap. However, there are alternatives to each of its parts and it tends to be quite rare, so it is not really a must-have.