Has there ever been a 6–6 in all competitions?

Yes, 6 times.

The first time: April 21, 1930, Leicester City and Arsenal drew (Leicester City 6–6 Arsenal) · Premier League.

The last time: March 19, 2000, Gimnasia y Esgrima La Plata and Colón drew (Gimnasia y Esgrima La Plata 6–6 Colón) · Primera Argentina, 26 years ago.

Nearby scores

1. 7–5 12 times
2. 7–6 Never
3. 7–7 Never
4. 6–5 25 times
5. 6–6 6 times
6. 5–5 48 times

All games

1. March 19, 2000 Gimnasia y Esgrima La Plata 6–6 Colón · Primera Argentina
2. May 6, 1995 Puebla 6–6 Atlante · Liga MX
3. June 16, 1991 RKC Waalwijk 6–6 FC Twente · Eredivisie
4. January 29, 1950 Atlético de Madrid 6–6 Athletic Bilbao · La Liga
5. April 13, 1941 Atlanta 6–6 Estudiantes de La Plata · Primera Argentina
6. April 21, 1930 Leicester City 6–6 Arsenal · Premier League