Kirby's Super Star runs at 15fps
Kirby's Dreamland 3 runs at 12fps
MM7 tends to drop frames into the high 40s/low 50s especially when charging the mega buster
MMX2 seems to be a pretty constant 60fps
Using New 3DS and the latest Retroarch build.
Are there any cores to download for Retroarch to potentially make games run better? The Help text says without cores Retroarch does nothing, yet I don't seem to have any and it's playing games.
The games you are listed all contained separate processors inside the cartridge, some work pretty well, like Capcoms Cx4 chip which was a math coprocessor chip in MMX games past 1.
Others, are just a pain for a lot of emulators...
In the Kirby games it is the Super accelerator 1 chip, or SA1,
10.74 MHz clock speed
2KBytes of internal RAM
Memory mapping capabilities
Limited data storage and compression
New DMA modes such as bitmap to bit plane transfer
Arithmetic functions (multiplication, division, and cumulative)
Hardware timer (either as a linear 18-bit timer, or synchronised with the PPU to generate an IRQ at a specific H/V scanline location)
Built-in CIC lockout, for copy protection and regional marketing control
And thats why the kirby games are like that.