Because each world has stronger enemies and as you progress the worlds you become stronger as well by levelling up.
How did Henry V11 protect the kingdom from possible enemies
The UK doesn't have any particular enemies.
Their enemies were people he he lol
The main enemies are the heartless and the bug blox.
Their enemies were people he he lol
mongoose
In Kingdom Hearts Birth by Sleep, the main enemies are called Unbirths. I believe they are controlled by Master Xehanort or Vanitas.
their enemies are the country of germany japan and france
Mario and Bowser are enemies because Bowser is always kidnapping Peach or causing trouble for the Mushroom Kingdom. That is why they are enemies.
Kony and alshabab where enemies of Uganda but Uganda is a powerful country but the person who defeated uganda is alshabab
Flounders actually have 2 enemies. They are anything that could eat them, or anything that could actually catch them.
Scotland has no enemies. But in the distant past England and Norway were sometimes the enemy.