Well, since Bomberman N-Gage is 20 years old, i decided to make some rankings depending on the vs mode (via bluetooth) win/lose counter difference.
(Please make sure to check High Scores to check your win and lose counter before you reply to submit your win and lose counter. For example: I have 28 wins and 3 losses, which is a difference of 25. So i am a Trained Bomber.)

Here are some classes.

(Class -4) Nonexistent Bomber - -50 wins than losses
(Class -3)Ashed Bomber - -25 wins than losses
(Class -2)Burning Bomber - -10 wins less than losses
(Class -1)Smoked Bomber - -1 win less than losses
(Class 0)Neutral Bomber - equal wins and losses
(Class 1)Beginner Bomber - 1 win greater than losses
(Class 2)Trained Bomber - 5 wins greater than losses
(Class 3)Amateur Bomber - 10 wins greater than losses
(Class 4)Kinder Bomber - 15 wins greater than losses
(Class 5)Copper Bomber - 25 wins greater than losses
(Class 6)Junior Bomber - 30 wins greater than losses
(Class 7)Middle Bomber - 45 wins greater than losses
(Class 8)Bronze Bomber - 50 wins greater than losses
(Class 9)Senior Bomber - 60 wins greater than losses
(Class 10)Professional Bomber - 75 wins greater than losses
(Class 11)Silver Bomber - 100 wins greater than losses
(Class 12)Golden Bomber - 150 wins greater than losses
(Class 13)Platinum Bomber - 200 wins greater than losses
(Class 14)Master Bomber - 250 wins greater than losses
(Class 15)Grand Master Bomber - 500 wins greater than losses

I put a ranking system in here--> https://docs.google.com/document/d/1X57-CoUxqPAFxKb47kWi5K5jh90fzWMDtg-1uhUh89c/edit?usp=sharing

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also known as 「クインサイデド」

I think I have 0 wins and 3 losses so maybe im a smoked bomber?