Based on the designs drawn by my friend, mlbjunior, here is a sheet of BOND's sprites, minus his Hollow-Tailed Saiyan forms which can be seen on Goruchigo's sheet: [link]
And here's his wiki page if you want to see mlbjunior's drawings of BOND: [link]
BOND is the four-way Potara Ring fusion of Goku, Naruto, Ichigo and Luffy from the series B.O.N.D.
1st Form- Bankai Gear Kyuubi Saiyan: His Bankai Gear Kyuubi Saiyan is a mix of Goku's Super Saiyan, Ichigo's Bankai, Naruto's Kyuubi Chakra, and Luffy's 2nd Gear. Chains begin to envelope BOND's arms, connecting him to more of Zangetsu's power.
2nd Form- 3-Tailed Gear Hollow 2: The 3-Tailed Gear Hollow 2 is a mix of Goku's SSJ2, Ichigo's Bankai Hollowfication, Naruto's Three-Tailed Release, and Luffy's 2nd Gear. The aura is similar to the previous form, but with added lightning from Goku's Super Saiyan 2.
3rd Form- Vasto Gear Sennin 3: This one is a mix of Goku's SSJ3, Ichigo's Vasto Lorde form, Naruto's Sage (Sennin) Mode, and Luffy's controlled 2nd Gear.
Final Form- Getsuga Rikodou 4: The Getsuga Rikodou 4 is a mix of Goku in SSJ4, Ichigo after the Final Getsuga Tensho mastery, Naruto in Rikudou Mode, and Luffy after the time skip. His power is increased exponentially. It is so great that it is suffocating to even the most powerful single warriors in each universe.
Spoiler: BOND has another transformation called the Full-Gear Bijuu 5. It is a combination of Ichigo's FullBring-enhanced Bankai, Luffy's Gear 3rd, Naruto's Bijuu Mode, and what is universally accepted as Goku's Super Saiyan 5 form.