I am looking for a manga where characters are summoned throughout the world (isekai) and have to fight each other in order to gain the pearl held by their opponents. If anyone in the world achieves to collect 5 (maybe another number) pearls, they get to make a wish to the Goddess of this world, and she will make anything possible.
The pearls are used on the characters weapons to level up each time they get a new one. The main character is a sword weilder and gets upgraded whenever he earns a new pearl.
I remember distinctively that the main character and his second (I believe it is a humanoid reptile lizard-like that uses magic and has a haut-de-forme hat) have to climb during the story on a high red mountain plateau like the one in Australia. I believe it is to fight a dragon at the top but am not sure about that info.