Do I need an appointment for my Non-B visa application at the Penang consulate?

No need for appointment in Penang - only in KualaLumpur.

Go early, around 8am,as they only allow 100 applicants a day - but I went there last month and we were like 20 people total...

If you need last minute copies, there's a van parked in front of the consulate where you can copy or get photos.

I say this because in Penang is mandatory to have copy of the entry stamp into Malaysia in addition to the usual passport pages copies.

Just get there early

Nope, no need for an appointment.