Ok, derp calculation on my part, but you still don't need a huge catering bonus or something to reach that stat. You get 65 from Champion and Colossus alone, let alone many other modifiers that are not catering.
Assuming Colossus and Champion are used (35+30 Strength for 60 Strength to offset the strength difference of 57). So that's 881 Strength on his part, now as aforementioned humans cannot get more than 231 as a Grandmaster Warrior given that they're Master Bard/Ninja/Puppetry/Lance. So that's 881+231=1112 with a 90 strength difference from the shown 1202. Where is that 90 strength coming from?
I understand the possibility of using a strength catering isn't strong here, but another point is how the HP/MP/Stam are also ridiculously high. Look at my base MP(730) and his base MP (659). From Talents everyone can get 135 MP given that they're Grandmaster Cleric. Outside of GM Cleric you only get 105 MP. 659+105 does not equal to 1060 MP unless I can't do math. 659 (Base MP) + 105 (From Master Cleric/Magic/Apothecary) equals 764 MP that should appear yellow, instead it's 1060. The difference is 296. Where is that 296 MP coming from? The same calculations can be done on HP/SP.
My conclusion is that a SP/HP/MP catering is used at the very least because I doubt anyone would be using those type enchants to boost that much.
P.S. I'm not attacking k1nsoo nor anyone else. I'm just pointing out that catering was indeed involved here.