Well for rivalries, here are some raw fighting numbers from the 2002-03 season to present. Only regular season games count and a fight is recorded as such if one player received a major.
Many different ways to consider rivalries but some interesting numbers.
Acadie-Bathurst Titan1 Cape Breton Screaming Eagles 60
2 Halifax Mooseheads 45
3 PEI Rocket 45
4 Moncton Wildcats 34
5 Rimouski Océanic 25
6 Saint John Sea Dogs 24
7 Shawinigan Cataractes 24
8 St John's Fog Devils 23
9 Lewiston Maineiacs 22
10 Drummondville Voltigeurs 20
11 Val-d'Or Foreurs 20
12 Baie-Comeau Drakkar 19
13 Chicoutimi Saguenéens 17
14 Québec Remparts 17
15 Rouyn-Noranda Huskies 14
16 Victoriaville Tigres 12
17 Gatineau Olympiques 10
18 Hull Olympiques 5
19 Montréal Rocket 4
20 Sherbrooke Beavers 2
Cape Breton Screaming Eagles1 Acadie-Bathurst Titan 60
2 PEI Rocket 41
3 Halifax Mooseheads 36
4 Moncton Wildcats 34
5 St John's Fog Devils 27
6 Victoriaville Tigres 21
7 Baie-Comeau Drakkar 19
8 Lewiston Maineiacs 19
9 Shawinigan Cataractes 17
10 Val-d'Or Foreurs 13
11 Rimouski Océanic 12
12 Saint John Sea Dogs 12
13 Gatineau Olympiques 9
14 Montréal Rocket 9
15 Québec Remparts 8
16 Drummondville Voltigeurs 7
17 Chicoutimi Saguenéens 5
18 Hull Olympiques 5
19 Rouyn-Noranda Huskies 5
Halifax Mooseheads1 Acadie-Bathurst Titan 45
2 Baie-Comeau Drakkar 45
3 Cape Breton Screaming Eagles 36
4 Moncton Wildcats 34
5 PEI Rocket 29
6 Québec Remparts 21
7 Rimouski Océanic 17
8 Drummondville Voltigeurs 15
9 Saint John Sea Dogs 13
10 St John's Fog Devils 13
11 Chicoutimi Saguenéens 11
12 Lewiston Maineiacs 11
13 Gatineau Olympiques 10
14 Shawinigan Cataractes 10
15 Val-d'Or Foreurs 10
16 Victoriaville Tigres 9
17 Rouyn-Noranda Huskies 7
18 Montréal Rocket 5
19 Sherbrooke Beavers 3
20 Hull Olympiques 2
Lewiston MAINEiacs1 Baie-Comeau Drakkar 37
2 PEI Rocket 29
3 St John's Fog Devils 27
4 Québec Remparts 25
5 Acadie-Bathurst Titan 22
6 Saint John Sea Dogs 21
7 Cape Breton Screaming Eagles 19
8 Moncton Wildcats 19
9 Rimouski Océanic 19
10 Rouyn-Noranda Huskies 16
11 Chicoutimi Saguenéens 14
12 Gatineau Olympiques 14
13 Victoriaville Tigres 12
14 Drummondville Voltigeurs 11
15 Halifax Mooseheads 11
16 Shawinigan Cataractes 11
17 Val-d'Or Foreurs 6
Moncton Wildcats1 PEI Rocket 49
2 Acadie-Bathurst Titan 34
3 Cape Breton Screaming Eagles 34
4 Halifax Mooseheads 34
5 Val-d'Or Foreurs 20
6 Drummondville Voltigeurs 19
7 Lewiston Maineiacs 19
8 Rouyn-Noranda Huskies 18
9 Shawinigan Cataractes 17
10 Gatineau Olympiques 15
11 Rimouski Océanic 15
12 Saint John Sea Dogs 15
13 St John's Fog Devils 14
14 Victoriaville Tigres 14
15 Baie-Comeau Drakkar 13
16 Chicoutimi Saguenéens 11
17 Québec Remparts 9
18 Hull Olympiques 3
19 Montréal Rocket 3
20 Sherbrooke Beavers 1
PEI Rocket1 Moncton Wildcats 49
2 Acadie-Bathurst Titan 45
3 Cape Breton Screaming Eagles 41
4 Halifax Mooseheads 29
5 Lewiston Maineiacs 29
6 St John's Fog Devils 23
7 Chicoutimi Saguenéens 19
8 Baie-Comeau Drakkar 18
9 Rimouski Océanic 18
10 Saint John Sea Dogs 15
11 Shawinigan Cataractes 14
12 Gatineau Olympiques 13
13 Québec Remparts 12
14 Val-d'Or Foreurs 11
15 Victoriaville Tigres 10
16 Drummondville Voltigeurs 8
17 Rouyn-Noranda Huskies 7
St John's Fog Devils1 Cape Breton Screaming Eagles 27
2 Lewiston Maineiacs 27
3 Acadie-Bathurst Titan 23
4 PEI Rocket 23
5 Saint John Sea Dogs 17
6 Moncton Wildcats 14
7 Drummondville Voltigeurs 13
8 Halifax Mooseheads 13
9 Québec Remparts 12
10 Val-d'Or Foreurs 6
11 Shawinigan Cataractes 5
12 Rimouski Océanic 4
13 Baie-Comeau Drakkar 3
14 Chicoutimi Saguenéens 3
15 Rouyn-Noranda Huskies 3
16 Victoriaville Tigres 3
17 Gatineau Olympiques 2
Saint John Sea Dogs1 Acadie-Bathurst Titan 24
2 Lewiston Maineiacs 21
3 St John's Fog Devils 17
4 Moncton Wildcats 15
5 PEI Rocket 15
6 Halifax Mooseheads 13
7 Cape Breton Screaming Eagles 12
8 Drummondville Voltigeurs 8
9 Baie-Comeau Drakkar 7
10 Rouyn-Noranda Huskies 7
11 Québec Remparts 6
12 Gatineau Olympiques 3
13 Victoriaville Tigres 3
14 Chicoutimi Saguenéens 2
15 Rimouski Océanic 2
16 Shawinigan Cataractes 2
17 Val-d'Or Foreurs 2