These were taken as "official" since it was adopted by Bird Studios and Shueisha. The reason it was adopted by them is because the info came from a fan's theory who was a member of Awawa World, which is also the name of Toriyama's official fanclub. Despite being "official" because of its adoption, I am going to drop the Kochira and Kinnikuman specials as they weren't be Toriyama.Wikis and fansites galore wrote:Awawa World(manga)
*Dr. Slump : 2years after events of Awawa World(manga).
*Wonder Island : 2years after the last episode of Dr. Slump.
*POLA & ROID : 2years after the last episode of Dr. Slump.
*Kochira Namekku-sei Dragon Ken-mae Hashutsujo : 12years after the last episode of Dr. Slump.
*Kinnikuman Seigichoujin Kameari Daishuketsu No Maki : 10years after the last episode of Dr. Slump.
*Neko Majin ga Iru : 12years after the last episode of Dr. Slump.
*Neko Majin Mike : 24years after the last episode of Dr. Slump.
*Neko Majin Z : 36years after the last episode of Dr. Slump.
Awawa World: ??? (Unreliable info indicates 2 years prior to Dr Slump)
Wonder Island: 744 (Takes place in 1979, which is 1-year prior to Dr Slump)
Dr Slump: Begins in 745, ends in 749. Arale meets Goku in 750.
Pola and Roid: 747 or 748 (2-3 years into Dr Slump's story)
Neko Majin ga Iru: ??? (Unreliable info indicates 12 years after Dr Slump)
Neko Majin Mike: 768 (2003, which is 23 years after the beginning of Dr Slump)
Neko Majin Z: 787, or 790. (story indicates year of 29th or 30th Budokai)
1) About 5,000,000 Years Ago: Pola and Roid accidentally travel back in time. They leave the gorillas Adam and Eve on Earth, as per their requests, and try to figure out how to return to their time as they fly away.
2) 708: Hiso Furusuni's (from Wonder Island) plane crashes, stranding him on Wonder Island.
3) 737: The Neko Majin of Neko Majin Mike begins his 31-year nap.
4) 743 (?): The Events of Awawa World. (unreliable info)
5) 744: The Events of Wonder Island.
6) 745-749: The Events of Dr. Slump.
7) 747-748: The Events of Pola and Roid.

9) 761 (?): The Events of Neko Majin ga Iru take place. (unreliable info)
10) 768: The Events of Neko Majin Mike.
11) 787 or 790:
April: The First Chapter of Neko Majin Z.
May 7th: Thunderbolt wins the 29th/30th Budokai.
September: The Second and Third Chapters of Neko Majin Z.
The Fourth and Fifth Chapters of Neko Majin Z.
Reasoning:
1) Pola and Roid get attacked by King Nikochan when reaching Earth. Thus we know it to take place in the same continuity as DB since King Nikochan is a Dr Slump character. Kaioshin mentions that Boo's egg was put on Earth when mankind was still a bunch of apes, which the daizenshuu lists as being at this time. It is implied in Pola and Roid that the Gorillas Adam and Eve are the ancestors of the apes that mankind evolved from.
I'll come back to this later. The AWAWA World years don't add up.