User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-17735225-20141020034530

I was gonna say that George was born from all the blood of vengeful elder dragons stabbed by the old dragonator mixed with gunpowder and took shape or something like that but, let's look at some more sensible ones!

- Since mostly we don't know much about elder dragons. We don't really know how it actually grow nor how fast it actually grows. One of the possible explaination is that George used to be smaller; enough to fit inside the warehouse and allow it to stole gunpowder and stuffs, hence the old dragonator disappearing act. And during which it might have developed a 'fondness' for its 'restaurant' (sense of home or just pure intelligence) that prevent it from destroying the warehouse even when it grows up (unlike Rath that are willing to ruin its own nest).

Now people might be wondering, even when it walk it create quakes! How the Nibelsnarf George can wander in without people noticing!

1. I believe the only period of time something as important as a warehouse can be left unguarded/unattended is after an elder dragon has been repelled/killed and there's a celebration following it. Since normally Elder dragons keep their distance to prevent fighting over territory anyway and no other monster are around when elder dragons invade, people normally left their stuffs unattended. Since George doesn't care about other Elder dragons (Due to it being able to fly and totally own anything anyday, and I think monsters naturally avoid smell of oil due to tar pits lying around) it just walk in and finish his meal while everyone is out there drunk and being silly to each other.

or

2. Rebuilding of damaged town after Elder dragon attacks, since construction works will make a lot of quake and oil smell anyway. People will be generally too tired to notice anything and guard will probably get transfered to the town to prevent thiefs and to help with the work as well. The amount of engines (and gunpowder) used might create enough smell to attract George to his lovely meal. And since the rebuilding takes a lot of time people aren't going to know when George arrived at the scene.