Ash has had a lot of companions throughout the series

[Petzbreeder]

Ash has travelled with many other trainers during the series. I know which of his companions have met the most of his other companions.

Misty met: Brock, Tracey, May and Max.
Brock met: Misty, Tracey, May, Max, Dawn and Cilan.
Tracey met: Misty, Brock, May and Max.
May met: Misty, Brock, Tracey, Max (obviously!) and Dawn.
Max met: Misty, Brock, Tracey and May (obviously!).
Dawn met: Brock, May, Iris and Cilan.
Iris met: Dawn and Cilan.
Cilan met: Brock, Dawn, Iris, Clemont and Bonnie.
Clemont met: Cilan, Bonnie (obviously!) and Serena.
Bonnie met: Cilan, Clemont (obviously!) and Serena.
Serena met: Clemont and Bonnie.

So, Brock has met the most of them so far, with a total of six!

Do you think any of Ash's Sun/Moon companions will meet previous ones?