Programing a Mini 05 without a USB-to-serial converter I have an Arduino Mini 05 clone Wattuino, an Elegoo Mega, a Powerboost 1000c, but not access to a USB-to-serial converter. Is there any way to program the Arduino Mini with these devices?

I tried to search it but they only mention using an Arduino uno as the chip can be put out of the board. Discusion
You can use the Mega. The only reason for "removing the chip from the board" is to disable it so it doesn't respond to the serial data - you can also disable it by just connecting the RESET pin to GND.