Dreamcast Accessories That are a Combination of Memory Card and Rumble Pack

[Nz17]

Some I know of are the following:

1. EMS 4 Meg Rumble Pack (does not actually contain 4 megabytes nor mebibytes of memory, only 512 kibibytes despite its claims) (translucent purple) (seems to originate from Hong Kong)
2. Joytech Advanced Jolt Pack (does not actually contain 1 megabyte nor mebibyte of memory, only 128 kibibytes despite its claims) (translucent black / gray) (seems to be British in origin)

What others are there?

[megasdkirby]

My guess is that they meant megabits and not megabytes, as 512KB is 4Mbits and 128KB is 1Mb. Unless theybtried to ve deceitful from the beginning.

[Niku-Sama]

i think there is a Performance brand tremor pak plus, kind of like the n64 version but for dc of course. i remember seeing those the most in stores when it was new.

also i found this:
https://segaretro.org/Dreamcast_third-party_Jump_Packs