Because public sources regarding this TV show are quite ambiguous I would like to list sources I used while adding it to TMDB and expain why there are 2 seasons with 26 + 52 episodes.

Generally the Nouky TV show consists of 2 parts:
1/ Nouky et ses amis (Nouky & Friends)

• 26 episodes
  
• created in 2006-2007
  
• no IMDB entry
  
• Produced by Olivier Duval for Studio 352
  
• no official page
  
• French wikipedia
  

2/ Paco, Nouky et Lola

• 52 episodes
  
• created in 2008
  
• IMDB entry
  
• Produced by Les Armateurs and Melusine productions (division of Studio 352)
  
• no official page
  
• French Wikipedia
  

Some sources present these two parts as sepearate TV Shows:

• French wikipedia 1 and French wikipedia 2
  
• IMDB which contains only the Paco, Nouky et Lola
  

And some sources present them as one TV show with 1-3 seasons:

• fernsehserien.de (3 seasons)
  
• Czech TV (1 season)
  
• Thetvdb (2-3 seasons) (I know that Thetvdb is a mess)
  

I did some research after which I'm leaning towards the 1 TV Show with 2 seasons because of the following arguments:

• Melusine production presents the Paco, Nouky et Lola as the 2nd season of Nouky & Friends (this studio is a division of Studio 352 which also made the 1st season)
  
• Studio 352 also presents Paco, Nouky et Lola as the 2nd season of Nouky & Friends
  
• AFAIK majority TV channeles broadcasts both parts as 1 TV show
  

If you find any compelling argument as to why change it (i.e. create separate TV Show for each season or change number of seasons) please post it here, so it can be corrected.