When did Zeedmillenniummon solo the Royal Knights, Three Great Angels, and the Digimon Sovereigns all at once?

[Super_Ascended_Sean_Pazdera]

I can't find where he did that anywhere.

 

[Amelia_Lonelyheart]

He didn't solo them ALL at once, more so he solo'd individual factions at once.

Royal Knights

For the Sovereigns, he did it in the video games. Here's a few exerts.

Qinglongmon: Ryo, you've done well in growing stronger. The demonic king who destroyed the Digital World is reviving. He is the demonic king that not even we Holy Beasts can strike. However, you have an unknown power which surpasses ours. Ryo! Go to the final practice dungeon. When it is cleared, the path to the demonic king of destruction will be opened.

Moon-Mille: ... I've been waiting... Ryo... I have revived so that I can defeat you... Heheheh... Now that I have revived, no digimon is a threat to me anymore. Not even the Four Holy Beasts can challenge me now. But... but you are different. You are the only random element that makes the impossible possible. Heheheh... The world does not need two beings with the same power. Now... come to me!

So yeah, he solo'd the Holy Beast in his weakest form.

Holy Beast = Sovereigns

No idea about the Angels though.

Edit: Source on those exerts. They're from the game "D1-Tamers", translated by the wonderful person behind "Remember Yesterday"

 

[Super_Ascended_Sean_Pazdera]

Oh, thanks.

 

[Antvasima]

Since the question has been answered, I will close this thread.